ViewBase

Defined in: js-api/src/views/view.ts:48

Subclass ViewBase to implement a Datagrok view in JavaScript.

Extends

• Widget

Extended by

• View
• MultiView

Constructors

Constructor

new ViewBase(params?, path?, createHost?): ViewBase

Defined in: js-api/src/views/view.ts:58

Parameters

Parameter	Type	Default value	Description
params	object | null	null	URL parameters.
path	string	''	URL path.
createHost	boolean	true	Create JS host wrapper.

Returns

ViewBase

Overrides

Widget.constructor

Properties

Property	Modifier	Type	Default value	Description	Overrides	Inherited from	Defined in
_functions	protected	Func[]	[]	-	-	Widget._functions	js-api/src/widgets/base.ts:207
_name	protected	string	'New View'	-	-	-	js-api/src/views/view.ts:108
_properties	protected	Property[]	[]	-	-	Widget._properties	js-api/src/widgets/base.ts:206
_root	protected	HTMLElement	undefined	-	-	Widget._root	js-api/src/u2core/component.ts:445
_u2	readonly	ComponentState	undefined	-	-	Widget._u2	js-api/src/u2core/component.ts:82
componentMeta?	public	ComponentMetaBase	undefined	The registry metadata of the tag that built this component, stamped by the spec renderer — the single source the introspection surface below is generated from.	-	Widget.componentMeta	js-api/src/u2core/component.ts:77
dart	public	any	undefined	-	Widget.dart	-	js-api/src/views/view.ts:49
factory	public	Func | null	null	Constructor function. No parameters, returns [Widget].	-	Widget.factory	js-api/src/widgets/base.ts:204
isDetached	public	boolean	false	Whether detach has been called.	-	Widget.isDetached	js-api/src/widgets/base.ts:214
props	public	any	undefined	Property bag over this widget's properties; read and write them by name.	-	Widget.props	js-api/src/widgets/base.ts:209
specProps?	public	Record<string, unknown>	undefined	The props the registry's create was handed, stamped alongside componentMeta: the last resort of the property read below, for a component that keeps a prop under another name or not at all (a create wrapping a bare element). Construction-time values — a live one always wins.	-	Widget.specProps	js-api/src/u2core/component.ts:81
subs	public	Subscription[]	undefined	Subscriptions cancelled when the widget is detached.	Widget.subs	-	js-api/src/views/view.ts:50
temp	public	any	undefined	Contains auxiliary information	-	Widget.temp	js-api/src/widgets/base.ts:201

Accessors

aiDescription

Get Signature

get aiDescription(): string | null

Defined in: js-api/src/u2core/component.ts:152

A short AI-facing briefing, seeded from the registry's usage or description.

Returns

string | null

Set Signature

set aiDescription(x): void

Defined in: js-api/src/u2core/component.ts:156

Parameters

Parameter	Type
x	string | null

Returns

void

Inherited from

ColumnGrid.aiDescription

---

ambientAdoption

Get Signature

get protected ambientAdoption(): boolean

Defined in: js-api/src/widgets/base.ts:266

A widget wrapper minted inside somebody's effect scope must not be auto-disposed with it.

Returns

boolean

Inherited from

Widget.ambientAdoption

---

basePath

Get Signature

get basePath(): string

Defined in: js-api/src/views/view.ts:138

URL prefix of the view (an app's root, such as /apps/Chem); path is this prefix plus the view's own relative path.

Returns

string

Set Signature

set basePath(s): void

Defined in: js-api/src/views/view.ts:139

Parameters

Parameter	Type
s	string

Returns

void

---

box

Get Signature

get box(): boolean

Defined in: js-api/src/views/view.ts:75

Returns

boolean

Set Signature

set box(b): void

Defined in: js-api/src/views/view.ts:76

Parameters

Parameter	Type
b	boolean

Returns

void

---

children

Get Signature

get children(): Widget<any>[]

Defined in: js-api/src/widgets/base.ts:301

Parent widget up the DOM tree, or null.

Returns

Widget<any>[]

Inherited from

Widget.children

---

closing

Get Signature

get closing(): boolean

Defined in: js-api/src/views/view.ts:156

Whether the view is currently closing.

Returns

boolean

Set Signature

set closing(c): void

Defined in: js-api/src/views/view.ts:157

Parameters

Parameter	Type
c	boolean

Returns

void

---

description

Get Signature

get description(): string

Defined in: js-api/src/views/view.ts:130

Returns

string

Set Signature

set description(s): void

Defined in: js-api/src/views/view.ts:131

Parameters

Parameter	Type
s	string

Returns

void

---

entity

Get Signature

get entity(): object | null

Defined in: js-api/src/views/view.ts:133

Returns

object | null

Set Signature

set entity(_e): void

Defined in: js-api/src/views/view.ts:134

Parameters

Parameter	Type
_e	object | null

Returns

void

---

helpUrl

Get Signature

get helpUrl(): string | null

Defined in: js-api/src/views/view.ts:90

Returns

string | null

View help URL.

Set Signature

set helpUrl(url): void

Defined in: js-api/src/views/view.ts:94

Parameters

Parameter	Type
url	string | null

Returns

void

---

innerView

Set Signature

set innerView(v): void

Defined in: js-api/src/views/view.ts:128

The view this one is currently surfacing, if it hosts another (such as a MultiView tab). grok.shell.t resolves through it.

Parameters

Parameter	Type
v	ViewBase | null

Returns

void

---

isPinned

Get Signature

get isPinned(): boolean

Defined in: js-api/src/views/view.ts:186

Whether the view is pinned. Pinned views are not closed when a new view is opened.

Returns

boolean

Set Signature

set isPinned(value): void

Defined in: js-api/src/views/view.ts:187

Parameters

Parameter	Type
value	boolean

Returns

void

---

name

Get Signature

get name(): string

Defined in: js-api/src/views/view.ts:111

A named control carries its name in the DOM: data-u2-name is the stable automation id selectors, tutorials and agents address the control by — the same attribute the spec renderer stamps on named nodes, so hand-built and spec-built UI share one selector vocabulary. Derived names (an input's label fallback) never stamp — see Component.deriveName.

Returns

string

Set Signature

set name(s): void

Defined in: js-api/src/views/view.ts:115

A named control carries its name in the DOM: data-u2-name is the stable automation id selectors, tutorials and agents address the control by — the same attribute the spec renderer stamps on named nodes, so hand-built and spec-built UI share one selector vocabulary. Derived names (an input's label fallback) never stamp — see Component.deriveName.

Parameters

Parameter	Type
s	string

Returns

void

Overrides

Widget.name

---

parent

Get Signature

get parent(): Widget<any> | null

Defined in: js-api/src/widgets/base.ts:298

Parent widget up the DOM tree, or null.

Returns

Widget<any> | null

Inherited from

Widget.parent

---

parentCall

Get Signature

get parentCall(): FuncCall | undefined

Defined in: js-api/src/views/view.ts:120

Returns

FuncCall | undefined

Set Signature

set parentCall(s): void

Defined in: js-api/src/views/view.ts:121

Parameters

Parameter	Type
s	FuncCall | undefined

Returns

void

---

parentView

Get Signature

get parentView(): ViewBase

Defined in: js-api/src/views/view.ts:123

Returns

ViewBase

Set Signature

set parentView(s): void

Defined in: js-api/src/views/view.ts:124

Parameters

Parameter	Type
s	ViewBase

Returns

void

---

path

Get Signature

get path(): string

Defined in: js-api/src/views/view.ts:182

View URI, relative to the view root

Returns

string

Set Signature

set path(s): void

Defined in: js-api/src/views/view.ts:183

Parameters

Parameter	Type
s	string

Returns

void

---

propertyTarget

Get Signature

get propertyTarget(): unknown

Defined in: js-api/src/u2core/component.ts:250

What this component's properties are read from and written to — prop.get(target) / prop.set(target, v): the component itself, unless an adoption says otherwise.

Returns

unknown

Inherited from

Widget.propertyTarget

---

propertyTier

Get Signature

get propertyTier(): boolean

Defined in: js-api/src/widgets/base.ts:270

Every property getProperties declares is a bind step, read and written on propertyTarget.

Returns

boolean

Inherited from

Widget.propertyTier

---

ribbonMenu

Get Signature

get ribbonMenu(): Menu

Defined in: js-api/src/views/view.ts:148

View menu. Sample: https://public.datagrok.ai/js/samples/ui/views/ribbon

Returns

Menu

Set Signature

set ribbonMenu(menu): void

Defined in: js-api/src/views/view.ts:149

Parameters

Parameter	Type
menu	Menu

Returns

void

---

root

Get Signature

get root(): HTMLElement

Defined in: js-api/src/views/view.ts:72

Returns

HTMLElement

Set Signature

set root(newRoot): void

Defined in: js-api/src/views/view.ts:73

Parameters

Parameter	Type
newRoot	HTMLElement

Returns

void

Overrides

Widget.root

---

scope

Get Signature

get scope(): Scope

Defined in: js-api/src/u2core/component.ts:53

Minted on first use; assigned before _scopeMinted fires, so the hook's own this.scope.own(...) reads the stored scope instead of re-entering the mint.

Returns

Scope

Inherited from

Widget.scope

---

statusBarPanels

Get Signature

get statusBarPanels(): HTMLDivElement[]

Defined in: js-api/src/views/view.ts:152

Status bar panels to be shown on the bottom

Returns

HTMLDivElement[]

Set Signature

set statusBarPanels(panels): void

Defined in: js-api/src/views/view.ts:153

Parameters

Parameter	Type
panels	HTMLDivElement[]

Returns

void

---

toolbox

Get Signature

get toolbox(): HTMLElement

Defined in: js-api/src/views/view.ts:143

View toolbox. Sample: https://public.datagrok.ai/js/samples/ui/views/toolbox

Returns

HTMLElement

Set Signature

set toolbox(x): void

Defined in: js-api/src/views/view.ts:144

Parameters

Parameter	Type
x	HTMLElement

Returns

void

---

type

Get Signature

get type(): string

Defined in: js-api/src/views/view.ts:85

View type

Returns

string

Overrides

Widget.type

Methods

_notifyPropertyChange()

protected _notifyPropertyChange(p): void

Defined in: js-api/src/widgets/base.ts:348

Notifies the property tier. Called from both the addProperty setter (overrides that skip super would otherwise lose props.x = writes) and onPropertyChanged (direct calls); the double notify collapses into one microtask refresh.

Parameters

Parameter	Type
p	Property | null

Returns

void

Inherited from

Widget._notifyPropertyChange

---

_ownPropertyChanges()

protected _ownPropertyChanges(): ObservableLike<PropertyChange>

Defined in: js-api/src/widgets/base.ts:353

Returns

ObservableLike<PropertyChange>

Inherited from

Widget._ownPropertyChanges

---

_scopeMinted()

protected _scopeMinted(_scope): void

Defined in: js-api/src/widgets/base.ts:317

First-mint hook: a platform descendant wires its lifecycle here. Never fired for a scope provided to init — that path runs inside the constructor chain.

Parameters

Parameter	Type
_scope	Scope

Returns

void

Inherited from

Widget._scopeMinted

---

_wireDartLifecycle()

protected _wireDartLifecycle(): void

Defined in: js-api/src/widgets/base.ts:333

Dart-owned lifecycle: the platform kill disposes the scope, and disposing the scope kills the widget through the kill-walk.

Returns

void

Inherited from

Widget._wireDartLifecycle

---

_wireJsLifecycle()

protected _wireJsLifecycle(): void

Defined in: js-api/src/widgets/base.ts:324

JS-owned lifecycle: disposing the scope detaches the widget, and vice versa.

Returns

void

Inherited from

Widget._wireJsLifecycle

---

_wireLifecycle()

protected _wireLifecycle(): void

Defined in: js-api/src/widgets/base.ts:319

Returns

void

Inherited from

Widget._wireLifecycle

---

acceptsPath()

acceptsPath(_urlPath): boolean

Defined in: js-api/src/views/view.ts:207

Checks if URL path is acceptable. Override in subclasses. [_urlPath] is the path WITHOUT the query string: a view claims a URL by its path, and decides what the parameters mean in handlePath.

Parameters

Parameter	Type
_urlPath	string

Returns

boolean

"true" if path is acceptable, "false" otherwise.

---

addProperty()

addProperty(propertyName, propertyType, defaultValue?, options?): any

Defined in: js-api/src/widgets/base.ts:376

Registers an property with the specified type, name, and defaultValue.

Parameters

Parameter	Type	Default value	Description
propertyName	string	undefined	-
propertyType	"string" | "bigint" | "object" | "map" | "file" | "bool" | "int" | "double" | "byte_array" | "datetime" | "qnum" | "dataframe" | "numerical" | "categorical" | "num" | "string_list" | "dataframe_list" | "cell" | "column" | "column_list" | "graphics" | "blob" | "tablerowfiltercall" | "colfiltercall" | "bitset" | "dynamic" | "viewer" | "list" | "semantic_value" | "func" | "funccall" | "property" | "GridCellRenderArgs" | "element" | "view" | "TableView" | "User" | "Menu" | "Project" | "event_data" | "progressindicator" | "Credentials" | "ScriptEnvironment" | "Notebook"	undefined	-
defaultValue	any	null	-
options	object & IProperty | null	null	-

Returns

any

See

Registered property gets added to properties. Returns default value, thus allowing to combine registering a property with the initialization

options.get/options.set override how the property reads/writes (instead of the default fieldName field access); the change notification (onPropertyChanged) always fires on write, and a {get}-only options yields a custom read with the default fieldName write.

Inherited from

Widget.addProperty

---

addStatusProvider()

addStatusProvider(name, provider): void

Defined in: js-api/src/widgets/base.ts:437

Adds live parts, hit areas and readings to this widget's status. Providers run in registration order on every read; an existing name is replaced in place, and later providers override earlier entries. Coordinates use the widget's own hit-area system. Detaching the widget removes all providers. A subclass that overrides getWidgetStatus composes with super.getWidgetStatus().

Parameters

Parameter	Type	Description
name	string	Stable name of the component contributing the status.
provider	StatusProvider	Computes the contribution each time the status is requested.

Returns

void

Example

widget.addStatusProvider('selection', () => ({values: {'selected rows': table.selection.trueCount}}));
console.log(widget.getWidgetStatus().values?.['selected rows']);
widget.removeStatusProvider('selection');
see samples/grid/custom-renderer-status

Inherited from

Widget.addStatusProvider

---

afterPersist()

protected afterPersist(): void

Defined in: js-api/src/views/view.ts:101

Gets called automatically when this view gets pinned

Returns

void

---

append()

append(item): HTMLElement

Defined in: js-api/src/views/view.ts:211

Appends an item to this view. Use appendAll for appending multiple elements.

Parameters

Parameter	Type
item	any

Returns

HTMLElement

---

appendAll()

appendAll(items): HTMLElement

Defined in: js-api/src/views/view.ts:217

Appends multiple elements this view. Use append for appending a single element.

Parameters

Parameter	Type
items	HTMLElement[]

Returns

HTMLElement

---

apply()

apply(properties): Widget

Defined in: js-api/src/widgets/base.ts:255

Parameters

Parameter	Type
properties	object

Returns

Widget

Inherited from

Widget.apply

---

bindProps()

bindProps(): BindProp[]

Defined in: js-api/src/u2core/component.ts:307

The signal-backed subset of the meta props — what a binding picker offers on a named node — plus, under propertyTier, every declared property. Allocates no signal.

Returns

BindProp[]

Inherited from

Widget.bindProps

---

bindStep()

bindStep(name): BindSource | Signal<unknown> | null

Defined in: js-api/src/u2core/component.ts:296

One binding step (DD5): a meta-declared prop's same-named Signal member — a named node is a bind source, generated off componentMeta the way getProperties is — then, under propertyTier, a cached signal over the declared property. '' answers the default binding: the component's own value signal, where one exists.

Parameters

Parameter	Type
name	string

Returns

BindSource | Signal<unknown> | null

Inherited from

Widget.bindStep

---

close()

close(): void

Defined in: js-api/src/views/view.ts:227

Closes this view.

Returns

void

---

deriveName()

protected deriveName(x): void

Defined in: js-api/src/u2core/component.ts:72

Sets the introspection/form key without claiming an automation id — the label-fallback path: a caption is not a stable identity, so it never reaches data-u2-name.

Parameters

Parameter	Type
x	string | undefined

Returns

void

Inherited from

Widget.deriveName

---

detach()

detach(): void

Defined in: js-api/src/views/view.ts:222

Detaches this view.

Returns

void

Overrides

Widget.detach

---

dispose()

dispose(): void

Defined in: js-api/src/u2core/component.ts:147

On a never-engaged wrapper the getter mints here and _scopeMinted wires the lifecycle (own(kill) + the platform cleanup for Dart-owned), so dispose still kills it; re-entry from the kill cleanup is a no-op via the scope's disposed flag.

Returns

void

Inherited from

Widget.dispose

---

effect()

effect(fn): this

Defined in: js-api/src/u2core/component.ts:134

Parameters

Parameter	Type
fn	() => void

Returns

this

Inherited from

Widget.effect

---

fireEvent()

protected fireEvent(eventId, args?): void

Defined in: js-api/src/u2core/component.ts:435

Parameters

Parameter	Type
eventId	string
args?	unknown

Returns

void

Inherited from

Widget.fireEvent

---

getDartProperties()

getDartProperties(): any[]

Defined in: js-api/src/widgets/base.ts:284

Dart handles of the properties that have one.

Returns

any[]

Inherited from

Widget.getDartProperties

---

getFunctions()

getFunctions(): Func[]

Defined in: js-api/src/widgets/base.ts:277

Functions that are applicable to this particular widget. Used in the UI to display context actions, and for the AI integrations.

Returns

Func[]

Inherited from

Widget.getFunctions

---

getIcon()

getIcon(): HTMLElement | null

Defined in: js-api/src/views/view.ts:171

Returns

HTMLElement | null

View icon. Override in subclasses.

---

getProperties()

getProperties(): Property[]

Defined in: js-api/src/widgets/base.ts:273

Returns all properties of this widget: the meta-generated ones plus addProperty's.

Returns

Property[]

Inherited from

Widget.getProperties

---

getRibbonPanels()

getRibbonPanels(): HTMLElement[][]

Defined in: js-api/src/views/view.ts:166

Returns

HTMLElement[][]

---

getWidgetStatus()

getWidgetStatus(): IWidgetStatus

Defined in: js-api/src/widgets/base.ts:413

Returns the widget's runtime structure for automated testing and introspection.

Returns

IWidgetStatus

Inherited from

Widget.getWidgetStatus

---

handlePath()

handlePath(_urlPath): void

Defined in: js-api/src/views/view.ts:201

Handles URL path. Override in subclasses.

[_urlPath] is the path WITHOUT the query string (see acceptsPath); the router has already updated the address bar, so read the parameters from window.location.search.

A handler may route elsewhere — set grok.shell.v to another view and the router leaves it alone (it only falls back to this view when the handler changed nothing).

Parameters

Parameter	Type
_urlPath	string

Returns

void

---

link()

link(name, source, twoWay): void

Defined in: js-api/src/u2core/component.ts:268

Keeps this component's name step and source equal, echo-suppressed by value; the reverse direction only where twoWay. A component that took source as its own signal needs no link and gets none; a read-only step cannot follow anything and gets none either.

Parameters

Parameter	Type
name	string
source	Signal<unknown>
twoWay	boolean

Returns

void

Inherited from

Widget.link

---

loadStateMap()

loadStateMap(_stateMap): void

Defined in: js-api/src/views/view.ts:179

Loads view state map. Override in subclasses.

Parameters

Parameter	Type
_stateMap	object

Returns

void

---

onEvent()

onEvent(eventId?): Observable<any>

Defined in: js-api/src/widgets/base.ts:410

Observes events with the specified eventId. Override in subclasses to provide actual events.

Parameters

Parameter	Type	Default value
eventId	string | null	null

Returns

Observable<any>

Inherited from

Widget.onEvent

---

onFrameAttached()

onFrameAttached(dataFrame): void

Defined in: js-api/src/widgets/base.ts:292

Called when a DataFrame is attached; override to bind data.

Parameters

Parameter	Type
dataFrame	DataFrame

Returns

void

Inherited from

Widget.onFrameAttached

---

onPropertyChanged()

onPropertyChanged(property): void

Defined in: js-api/src/widgets/base.ts:281

Gets called when viewer's property is changed.

Parameters

Parameter	Type	Description
property	Property | null	or null, if multiple properties were changed.

Returns

void

Inherited from

Widget.onPropertyChanged

---

own()

own(dispose): this

Defined in: js-api/src/u2core/component.ts:139

Parameters

Parameter	Type
dispose	() => void

Returns

this

Inherited from

Widget.own

---

pin()

pin(): void

Defined in: js-api/src/views/view.ts:190

Pins the view. Pinned views are not closed when a new view is opened.

Returns

void

---

propertyChanges()

protected propertyChanges(): ObservableLike<PropertyChange>

Defined in: js-api/src/widgets/base.ts:363

What refreshes the property tier's cached signals from outside: null where nothing announces a change (one-way).

Returns

ObservableLike<PropertyChange>

Inherited from

Widget.propertyChanges

---

registerFunction()

protected registerFunction(f): void

Defined in: js-api/src/u2core/component.ts:431

Parameters

Parameter	Type
f	FuncLike

Returns

void

Inherited from

Widget.registerFunction

---

removeStatusProvider()

removeStatusProvider(name): void

Defined in: js-api/src/widgets/base.ts:446

Removes the status contribution registered under name; an absent name is a no-op.

Parameters

Parameter	Type	Description
name	string	The name passed to addStatusProvider.

Returns

void

Example

widget.removeStatusProvider('selection');
see samples/grid/custom-renderer-status

Inherited from

Widget.removeStatusProvider

---

runInScope()

runInScope<T>(fn): T

Defined in: js-api/src/u2core/component.ts:130

Type Parameters

Type Parameter
T

Parameters

Parameter	Type
fn	() => T

Returns

T

Inherited from

Widget.runInScope

---

saveStateMap()

saveStateMap(): object | null

Defined in: js-api/src/views/view.ts:176

Returns

object | null

Viewer state map. Override in subclasses.

---

setIcon()

setIcon(icon): void

Defined in: js-api/src/views/view.ts:173

Parameters

Parameter	Type
icon	HTMLElement

Returns

void

---

setRibbonPanels()

setRibbonPanels(panels, clear?): void

Defined in: js-api/src/views/view.ts:162

Sets custom view panels on the ribbon.

Parameters

Parameter	Type	Default value	Description
panels	HTMLElement[][]	undefined	-
clear	boolean	true	Clear all previous before setup Sample: https://public.datagrok.ai/js/samples/ui/views/ribbon

Returns

void

---

sourceRowsChanged()

sourceRowsChanged(): void

Defined in: js-api/src/widgets/base.ts:289

Called when the rows the widget shows change; override to refresh.

Returns

void

Inherited from

Widget.sourceRowsChanged

---

sub()

sub(subscription): void

Defined in: js-api/src/widgets/base.ts:250

Registers a subscription to an external event.

Parameters

Parameter	Type
subscription	Subscription

Returns

void

Inherited from

Widget.sub

---

toDart()

toDart(): any

Defined in: js-api/src/widgets/base.ts:243

The Dart handle of this widget, created on first use.

Returns

any

Inherited from

Widget.toDart

---

build()

static build(builder): Control

Defined in: js-api/src/u2core/component.ts:529

Builds a control out of plain elements: builder runs with the new control's scope ambient, so signal bindings and nested components inside it are owned by the result. The ambient scope only spans the synchronous part of builder — components constructed after an await inside it are adopted by nobody and must be disposed by hand, or constructed before the first await.

Parameters

Parameter	Type
builder	() => HTMLElement | (string | HTMLElement | Control)[]

Returns

Control

Inherited from

Widget.build

---

find()

static find(root): Widget<any> | null

Defined in: js-api/src/widgets/base.ts:232

Finds existing widget from its visual root.

Parameters

Parameter	Type
root	Element

Returns

Widget<any> | null

Inherited from

Widget.find

---

forElement()

static forElement(el): Control | undefined

Defined in: js-api/src/u2core/component.ts:489

The nearest control owning el — the DOM → component door for tooling, automation and inspectors (the u2 counterpart of the platform's Widget.find). Best-effort: the last control constructed on (or assigned) a root wins it.

Parameters

Parameter	Type
el	Element | null

Returns

Control | undefined

Inherited from

Widget.forElement

---

fromRoot()

static fromRoot(root): Widget

Defined in: js-api/src/widgets/base.ts:452

Creates a new widget from the root element.

Parameters

Parameter	Type
root	HTMLElement

Returns

Widget

Inherited from

Widget.fromRoot

---

getAll()

static getAll(): Widget<any>[]

Defined in: js-api/src/widgets/base.ts:227

Returns all currently active widgets.

Returns

Widget<any>[]

Inherited from

Widget.getAll

---

init()

static init(self, scope?): void

Defined in: js-api/src/u2core/component.ts:89

Per-instance state, for a constructed component and for an adopted platform object alike.

Parameters

Parameter	Type
self	Component
scope?	Scope

Returns

void

Inherited from

Widget.init

---

is()

static is(x): x is Control

Defined in: js-api/src/u2core/component.ts:498

Structural probe by methods only — never .scope: the accessor mints.

Parameters

Parameter	Type
x	unknown

Returns

x is Control

Inherited from

Widget.is

---

registerCleanup()

static registerCleanup(element, cleanup): void

Defined in: js-api/src/widgets/base.ts:238

Registers a cleanup function to run when [element] is killed — i.e. when its host view or pane closes. Also marks the element so the kill-walk can find it.

Parameters

Parameter	Type
element	Element
cleanup	Callback

Returns

void

Inherited from

Widget.registerCleanup

---

sameValue()

static sameValue(a, b): boolean

Defined in: js-api/src/u2core/component.ts:111

The equality the property tier and link suppress echoes by: Object.is, arrays element-wise, plain objects key-wise (recursive), everything else by identity.

Parameters

Parameter	Type
a	unknown
b	unknown

Returns

boolean

Inherited from

Widget.sameValue